package homework;

public class Circle extends Shape{

	protected double radius;
	
	public Circle() {
		this.type="圆";
	}
	
	public void calculate() {
		this.area=Math.PI*Math.pow(radius, 2);
	}
	
	public void description() {
		System.out.println(this.type+"的半径为："+radius);
		this.show();
	}
}
